Steam-generator



(No'ModeL) Q 2 -Sheets-Sheet 1.

R; G. FERGUSON.

STEAM GENERATOR.

NO. 356,827. Patented-Peb.'1, 1387. l

( 2 Sheets-Sheet 2.

R. G. FERGUSON,

STEAM GENERATOR.

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ROBERT G. FERGUSON, OF SARATOGA, NEW YORK.

-STEAM-GENERATOR.

SPECIFECATION forming part. of Letters Patent l io. 356,827, dated Eebruary 1, 1887.

Application filed July 20, 1885.

To all whom it may concern:

Be it known that l, Bonner G. FERGUSON, a citizen of the United States, residing at Saratoga, in the county of Saratoga and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

My invention relates to certain new devices and elements and combinations of devices and elements hereinafter particularly described, and specifically set forth in the claims.

The objects of my invention are to provide means whereby the heating-surfaces of the generator will be greatly increased and be in better situation than heretofore for being heated by the hot gases from the tire, and also for providing means by which nearly all the heat from the burning fuel wiil be utilized for heating the several heatingsurfoces of the generator instead of passing oil to the chimney or smoke-stack in a large measure, as heretofore. I attain these objects by the means illustrated in the accompanying drawings, (in two sheets.) forming a part of this specifics tion, in which Figure l a plan View of my improved generator. Fig. is 21. sectional elevation of the same, taken from front to rear, as at line 1 in Fig. 1. Fig. 3 is a sectional view taken from side to side, as at line 2 in Fig. 1. Fig. 4 is a horizontal sectional view taken at line 3 in Fig. 2.

The same letters of reference refer to like parts throughout the several views.

A represents the shell of o. steam generator or boiler. 13 is the the box or chamber of the same.

A is the circular leg of the generator, in which wall (4 forms the outer wall of the firechamber.

aa are vertical tubular fluesextending from the upper wall of the firechninber up to the upper Wall or head of the generator, and through which the hot gases drawn from the fire will have passage.

G is the fuelonegnzine by means of which fuel will be introduced into the fire-chamber, and b isahopperleeding to this magazine from above.

D isa passageway or opening from the front to the fire-chamber above the grate E, through Serial No. 172,178.

F is the ash-pit and G is the passageway to the same, and is provided with door 9, provided with anysuiteble damper. All these parts are old, and therefore require no particular description.

Arranged exterior to shell A of this generator are one or more series of water or steam pipes or tubes, c 0, which communicate with the chamber room of the generator-body proper by means oi'suitable elbow connections, 0 c, as shown. The drawings showtwo series of these exterior tubes or pipes, c, in which those of one series are arranged relatively outside the circular line of the other, and with those of the inner series made with a uniformly shorter length then those of the outer series, so as to terminate above and below at a short distance from the terminal ends of the outer pipes or tubes, have entrance to between these tubes in their passage to. the chimney or smoke-pipe. This shell A and its circular leg A", internal tubulnr fines, (1, end exterior water pipes or tubes, 0, together with the firechainberlf, constitute the generator proper.

H is an outer walhinclosing this generator, and is shown to be made of brick, though a jacketof cast or sheet iron may be substituted. The interior surface of this Wall is made to set ed to a short distance from the outer series of pipes, 0, so as to produce between the generator and the wall a free space about equal to the vertical extension ofthe generator. Partitions I T, arranged at about midway between the front and rear side of the vertical ohamber,are provided at the opposite sides of this generator and extend from shell A to wall H, so as to divide the space between the generator and wall into two chambers, J and K. The drawings show these partitions I to be made of brick, though they may be made of iron, if prefered. These chambers J and K form substantially vertical fines, by means of which the currents of hot gases will be reverted after passing from the tubular does a.

Aorist-iron plate, L, provided with a central opening for receiving hopper I), is set over the upper end of well H, at at short distance above the upper end of shell A, thereby producing a horizontal flue-chamber, M, which com municates with the front vertical flue-chamber, J.

which opening the the will be viewed.

The upper end ofrear flueohamber,K,is closed that the hot gases will readily ICO from communication with horizontal fluechamber M by brick (or an iron plate) stop N, and an exit-opening, O, is provided in the wall at a point opposite the upper end of rear fine, K, for escape of the gases to the chimney or smoke-pipe.

P P are openings made in the lower end of vertical partitions I I, through which the front vertical fluechamber communicates with the rear fluechamber, K, at their lower ends.

I prefer to make the inclosing-wall H of brick, as that material is best calculated to retain the heat within the flue-chambers and operates as a good non-conductor between the generator and the room outside. Another ad vantage is that this brick wall will not be as readily broken as will cast-iron plates in a jacket, or be bent, as will sheet-iron.

The fire is made in fire-chamber B, and the heat radiating from the side portions of the fire will act on wall a between the fire and water in leg A of the generator and highly heat the same, so as to make the action of the radiant heat from the fire very efiective for generating steam, while at the same time the hot gases from the fire will pass up through the several vertical tubular dues to and heat the walls thereof, and then be discharged into the horizontal flue-chamber M, and pass thence forward into the front vertical flue-chamber, J, to circulate between the exterior series of water and steampipes, c, in that chamber, and thence have passage through openings 1? P into the rear flue-chamber, K, to circulate upward between the exterior steam and. water pipes, c, in said line, and finally escape through exitopening 0 into the chimney or smoke-pipe. In this circuitous passage of the hotgases from the firechamber to the exit the greater portion of the heat of the gases will be absorbed by the metal surfaces along which they pass, and be taken up by the metal and communicated to the water and steam in contact with the walls of the tubular fines a, shell A, and

5 water-pipes 0.

By the above-described improvements a small amount of fuel will be made to generate a greater amount of steam than can be generated in steam boilers or generators which have only the walls of the shell and tubular fines for communicating heat to the water; and I am enabled to make a low-pressure boiler as effective for generating steam for heating-radiators as high-pressure boilers as heretofore constructed.

My above-described improvements are applicable to steam boilers or generators for driving engines as well as to generators for heatingradiators for warming purposes.

Having described my invention, what I claim as new, and desire to secure by Letters Patent. is

1. The combination, with the tubular boiler and one or more series of water or steam pipes arranged exterior to the shell of the same and communicating with the chamber of the same, of a horizontal fine-chamber, and. an exterior wall inclosing vertical flnechambers containing said series of pipes, and partitions separat' ing said vertical flue-chambers and provided at their lower ends with openings, and the exit-opening to the chimney or smoke-pipe, substantially as and for the purposes set forth.

2. The combination, with a boiler having a water -1eg concentric to the fire-chamber, and provided with tubular fines leading from said fire-chamber to a horizontal flue located wholly exterior to the boiler, of one or more series of water or steam pipes which are arranged exterior to the shell of the boiler, and communicate from the water-leg to the upper end portion of the boiler chamber, and are contained within vertical fines which are be- Witnesses:

THOMAS DOUGLASS, WILLIAM H. MILLER. 

